CHEMISTRY WORKSHEET
Firearms and Toolmark Identification
Name: __________________________
1. a. What are class characteristics? _______________________________________________
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b. What are individual characteristics? ____________________________________________
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2. With what is a typical firearms identification concerned? ______________________________
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3. What does rifling give the bullet? _________________________________________________
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4. What happens to a bullet as it moves down the barrel of a firearm? ______________________
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5. How does a lab test whether a bullet from a crime scene came from a suspect weapon? _____
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6. List and describe the two types of imprint evidence. __________________________________
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7. What three types of objects can leave impression evidence? ___________________________
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8. How do wheelbase and tread design help investigators solve a crime involving a car? _______
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9. List and describe the three types of toolmark impressions. _____________________________
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10.What are chemical manufacturers now doing to help investigators solve crimes involving
chemicals? __________________________________________________________________
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